Mic Trouble - LG -S310 Service Manual

4.9.3 MIC Trouble

Check MIC signal path
-FPCB VMIC_BIAS_P (TP1)
-FPCB MIC_P (TP2)
-MIC100
MIC_P
MIC_N
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Only for training and service purposes
VMIC_BIAS_P
TP2
L100 47n
L101 47n
TP1
Figure 4.9.3.1 FPCB MIC Check point
Figure 4.9.3.2 FPCB MIC Check point
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4. TROUBLE SHOOTING
1
OUT
2
G1
3
SUMY0010610
G2
4
UNIT,-42dB,4.72*3.76*1.25
G3
5 SPM0410LR5H-QB
PWR
6
MIC100
G4
LGE Internal Use Only